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Zorluk: ZorPediatric Musculoskeletal Disorders

Match the following clinical presentations of pediatric limp and lower extremity pain with their most accurate underlying pathophysiologic description.

  • An overweight early adolescent male presents with progressive limp and knee discomfort; physical examination is notable for the thigh obligatorily rotating outward upon passive hip flexion.Posterior and inferior slippage of the proximal femoral epiphysis due to shearing forces at the growth plate.
  • A young school-aged male develops an insidious-onset limp with minimal pain; pelvic imaging reveals a dense, flattened proximal femoral ossification center.Idiopathic avascular necrosis resulting in the disruption of blood supply to the capital femoral epiphysis.
  • A febrile toddler acutely refuses to stand on one leg; laboratory evaluation shows marked elevation of both C-reactive protein and erythrocyte sedimentation rate, with the joint held in flexion and abduction.Acute purulent bacterial infection of the intra-articular space that typically requires emergent surgical decompression.
  • A preschool-aged child exhibits a mild limp and hip pain shortly after a rhinovirus infection; inflammatory markers are completely normal and the patient remains afebrile.Benign, self-limiting sterile inflammation of the joint capsule that typically resolves with supportive care.

Cevap

The overweight adolescent matches with physeal slippage (SCFE); the school-aged boy with a flattened epiphysis matches with idiopathic avascular necrosis (Legg-Calvé-Perthes); the febrile toddler matches with purulent bacterial infection (Septic Arthritis); and the afebrile post-viral child matches with benign capsule inflammation (Transient Synovitis).
Each clinical presentation contains pathognomonic features for a specific pediatric musculoskeletal disorder. Age stratification (toddler vs. school-aged vs. adolescent) combined with inflammatory markers and specific physical exam maneuvers (obligate external rotation) definitively separates these conditions.

Adım Adım Çözüm

1
Analyze the presentation of the overweight adolescent with knee pain and obligate external hip rotation.
Identified as Slipped Capital Femoral Epiphysis (SCFE).
SCFE classically presents in early adolescence (often in patients with high BMI) with groin or referred knee pain and a pathognomonic external rotation of the leg upon passive hip flexion due to the posterior and inferior displacement of the epiphysis.
2
Evaluate the young school-aged male with an insidious, painless limp and dense, flattened epiphysis.
Identified as Legg-Calvé-Perthes disease (LCPD).
LCPD typically affects children aged 4-8 years and is characterized by idiopathic avascular necrosis of the femoral head, leading to radiographic flattening and sclerosis.
3
Assess the highly febrile toddler with elevated inflammatory markers and refusal to bear weight.
Identified as Septic Arthritis.
The presence of fever, non-weight bearing status, and elevated ESR/CRP fulfills the Kocher criteria, making acute purulent bacterial infection highly likely. This is an orthopedic emergency.
4
Review the preschool-aged child with a post-viral limp and normal laboratory studies.
Identified as Transient Synovitis.
The lack of systemic inflammatory signs and history of a recent upper respiratory infection point to a benign, sterile inflammation of the hip joint.

Anahtar Kavram

Accurate diagnosis of pediatric hip disorders requires correlating the patient's age and systemic inflammatory status (Kocher criteria) with specific anatomic findings (e.g., obligate external rotation, avascular necrosis).
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Pediatric Musculoskeletal Disorders

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